Terminator (character Concept)
In the Terminator film series, a terminator is an autonomous robot, typically humanoid, originally conceived as a virtually indestructible soldier, infiltrator and assassin.
James Cameron introduced the first terminator character in the 1984 movie The Terminator, featuring a single cyborg simply called "The Terminator", portrayed by Arnold Schwarzenegger. When later Terminator movies introduced additional models, some sources retroactively gave Schwarzenegger's character a model number, leading to multiple conflicting names.
Read more about Terminator (character Concept): Physical Characteristics, Development of The Terminators, Models